Did you guys notice that the manual in the pic of link #1 actually says "SL-7500C"? Furthermore i thought the black keyboard was just a SL-C700 thing, not the SL-C75(6)0. and the area around the screen is silver on the SL-7500C while the SL-C750 is black and 760 is silver.

Hardware wise this SL-7500C looks like a SL-700C based on the colors.

Does anyone know if it's really a 700 with a different name (because of regions)?

Yes, but in the Jap version you still have Jap Chars, in the Chin ver you ONLY have english Chars, no Chin chars at all.

The key with Japanese characters on them on the Japanese version are only to do with the Japanese Input method - changing between hiragana,katakana, and ascii, changing between half and full width characters and selecting kanji candidates from list, as Chinese on has one set of characters (kanji) they don't need the other buttons